Ricardo Neri 9c0b842036 OMAPDSS: Provide an interface for audio support ... There exist several display technologies and standards that support audio as well. Hence, it is relevant to update the DSS device driver to provide an audio interface that may be used by an audio driver or any other driver interested in the functionality. The audio_enable function is intended to prepare the relevant IP for playback (e.g., enabling an audio FIFO, taking in/out of reset some IP, enabling companion chips, etc). It is intended to be called before audio_start. The audio_disable function performs the reverse operation and is intended to be called after audio_stop. While a given DSS device driver may support audio, it is possible that for certain configurations audio is not supported (e.g., an HDMI display using a VESA video timing). The audio_supported function is intended to query whether the current configuration of the display supports audio. The audio_config function is intended to configure all the relevant audio parameters of the display. In order to make the function independent of any specific DSS device driver, a struct omap_dss_audio is defined. Its purpose is to contain all the required parameters for audio configuration. At the moment, such structure contains pointers to IEC-60958 channel status word and CEA-861 audio infoframe structures. This should be enough to support HDMI and DisplayPort, as both are based on CEA-861 and IEC-60958. The omap_dss_audio structure may be extended in the future if required. The audio_enable/disable, audio_config and audio_supported functions could be implemented as functions that may sleep. Hence, they should not be called while holding a spinlock or a readlock. The audio_start/audio_stop function is intended to effectively start/stop audio playback after the configuration has taken place. These functions are designed to be used in an atomic context. Hence, audio_start should return quickly and be called only after all the needed resources for audio playback (audio FIFOs, DMA channels, companion chips, etc) have been enabled to begin data transfers. audio_stop is designed to only stop the audio transfers. The resources used for playback are released using audio_disable. A new enum omap_dss_audio_state is introduced to help the implementations of the interface to keep track of the audio state. The initial state is _DISABLED; then, the state transitions to _CONFIGURED, and then, when it is ready to play audio, to _ENABLED. The state _PLAYING is used when the audio is being rendered. Signed-off-by: Ricardo Neri <ricardo.neri@ti.com>		2012-05-11 15:13:50 +03:00
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ABI	Merge branch 'for-3.4/drivers' of git://git.kernel.dk/linux-block	2012-04-13 18:45:13 -07:00
DocBook	Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media	2012-04-21 12:43:23 -07:00
EDID	drm: allow loading an EDID as firmware to override broken monitor	2012-03-20 10:09:28 +00:00
PCI	…
RCU	rcu: Call out dangers of expedited RCU primitives	2012-02-21 09:06:08 -08:00
accounting	…
acpi	Update documentation for parameter *notrigger* in einj.txt	2012-03-30 03:30:19 -04:00
aoe	Documentation: remove references to /etc/modprobe.conf	2012-03-30 16:03:15 -07:00
arm	OMAPDSS: Provide an interface for audio support	2012-05-11 15:13:50 +03:00
auxdisplay	…
backlight	backlight: new backlight driver for LP855x devices	2012-03-23 16:58:33 -07:00
blackfin	…
block	Documentation: drop as block elevator reference in switching-sched.txt	2011-11-04 12:01:48 -07:00
blockdev	Documentation: remove references to /etc/modprobe.conf	2012-03-30 16:03:15 -07:00
cdrom	…
cgroups	memcg: fix up documentation on global LRU	2012-04-12 13:12:11 -07:00
connector	…
console	…
cpu-freq	Doc: cpufreq: Fix typo and outdated line	2011-11-08 10:23:29 +01:00
cpuidle	cpuidle: add a sysfs entry to disable specific C state for debug purpose.	2012-03-30 01:52:58 -04:00
cris	…
crypto	…
development-process	Documentation: Update stable address	2011-12-12 14:14:31 -08:00
device-mapper	dm: add verity target	2012-03-28 18:43:38 +01:00
devicetree	ARM: SoC fixes for 3.4-rc2	2012-04-05 22:13:39 -07:00
driver-model	Merge remote-tracking branches 'regulator/topic/devm' and 'regulator/topic/stub' into regulator-next	2012-03-18 21:38:28 +00:00
dvb	[media] lmedm04 RS2000 Firmware details	2012-03-19 14:55:55 -03:00
early-userspace	…
fault-injection	fault-injection: update documentation with the mmc module param	2011-10-26 16:32:13 -04:00
fb	Documentation: remove references to /etc/modprobe.conf	2012-03-30 16:03:15 -07:00
filesystems	typo fix in Documentation/filesystems/vfs.txt	2012-04-09 01:39:24 -04:00
firmware_class	…
frv	…
hid	…
hwmon	hwmon: (k10temp) Add support for AMD Trinity CPUs	2012-04-01 10:25:56 -07:00
i2c	Documentation: remove references to /etc/modprobe.conf	2012-03-30 16:03:15 -07:00
i2o	Documentation: Fix multiple typo in Documentation	2012-03-07 16:08:24 +01:00
ia64	…
ide	Documentation: remove references to /etc/modprobe.conf	2012-03-30 16:03:15 -07:00
infiniband	…
input	Documentation: input.txt: clarify mousedev 'cat' command syntax	2012-03-30 16:03:15 -07:00
ioctl	Merge branch 'for-next' of git://gitorious.org/kernel-hsi/kernel-hsi	2012-04-02 09:50:40 -07:00
isdn	Documentation: remove references to /etc/modprobe.conf	2012-03-30 16:03:15 -07:00
ja_JP	…
kbuild	Documentation: mention scripts/diffconfig tool	2012-03-30 16:03:15 -07:00
kdump	[S390] Add s390x description to Documentation/kdump/kdump.txt	2011-12-27 11:27:13 +01:00
ko_KR	driver-core: documentation: fix up Greg's email address	2012-02-15 14:48:01 -08:00
laptops	Documentation: remove references to /etc/modprobe.conf	2012-03-30 16:03:15 -07:00
leds	drivers/leds/leds-lp5521.c: support led pattern data	2012-03-23 16:58:34 -07:00
m68k	…
make	…
mips	…
misc-devices	…
mmc	mmc: core: Fixup delayed work clock gating patch	2012-01-11 23:58:43 -05:00
mn10300	…
mtd	…
namespaces	…
netlabel	…
networking	doc, net: Update ndo_start_xmit return type and values	2012-04-06 02:43:13 -04:00
nfc	…
parisc	…
pcmcia	…
power	PM / Freezer / Docs: Document the beauty of freeze/thaw semantics	2012-02-09 23:55:49 +01:00
powerpc	Documentation/powerpc/mpc52xx.txt: Checkpatch cleanup	2012-03-18 23:59:34 +01:00
pps	…
prctl	…
pti	…
ptp	…
rapidio	RapidIO: documentation update	2011-11-02 16:07:02 -07:00
s390	Documentation: remove references to /etc/modprobe.conf	2012-03-30 16:03:15 -07:00
scheduler	sched: Remove sched_switch	2012-01-27 13:28:53 +01:00
scsi	SCSI updates on 20120331	2012-03-31 13:31:23 -07:00
security	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2012-03-21 13:25:04 -07:00
serial	Documentation: remove references to /etc/modprobe.conf	2012-03-30 16:03:15 -07:00
sh	…
sound	ALSA: hda/realtek - Add a few ALC882 model strings back	2012-04-11 14:10:57 +02:00
sparc	…
spi	spi: create a message queueing infrastructure	2012-03-07 19:19:48 -07:00
sysctl	Documentation: add missing tainted bits to Documentation/sysctl/kernel.txt	2012-02-06 16:29:19 -08:00
target	Documentation: Fix typo in tcm_mod_builder.py	2012-02-10 09:52:18 +01:00
telephony	…
thermal	thermal: Rename generate_netlink_event	2012-01-23 03:15:25 -05:00
timers	…
trace	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2012-03-20 21:12:50 -07:00
usb	USB documentation: explain lifetime rules for unlinking URBs	2012-04-06 13:54:00 -07:00
vDSO	…
video4linux	Documentation: remove references to /etc/modprobe.conf	2012-03-30 16:03:15 -07:00
virtual	Merge branch 'kvm-updates/3.4' of git://git.kernel.org/pub/scm/virt/kvm/kvm	2012-03-28 14:35:31 -07:00
vm	mm: move hugepage test examples to tools/testing/selftests/vm	2012-03-28 17:14:37 -07:00
w1	…
watchdog	watchdog: Add support for WDIOC_GETTIMELEFT IOCTL in watchdog core	2012-03-27 20:15:37 +02:00
wimax	…
x86	…
zh_CN	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2012-03-20 21:04:47 -07:00
.gitignore	…
00-INDEX	crc32: move long comment about crc32 fundamentals to Documentation/	2012-03-23 16:58:37 -07:00
BUG-HUNTING	…
Changes	…
CodingStyle	Documentation: CodingStyle: add inline assembly guidelines	2012-03-30 16:03:15 -07:00
DMA-API-HOWTO.txt	…
DMA-API.txt	include/linux/dma-mapping.h: add dma_zalloc_coherent()	2011-11-02 16:07:02 -07:00
DMA-ISA-LPC.txt	…
DMA-attributes.txt	common: DMA-mapping: add NON-CONSISTENT attribute	2012-03-28 16:36:44 +02:00
HOWTO	Documentation: Update stable address	2011-12-12 14:14:31 -08:00
IPMI.txt	…
IRQ-affinity.txt	…
IRQ-domain.txt	irq_domain: add documentation and MAINTAINERS entry.	2012-02-14 14:06:47 -07:00
IRQ.txt	…
Intel-IOMMU.txt	…
Makefile	mm: move hugepage test examples to tools/testing/selftests/vm	2012-03-28 17:14:37 -07:00
ManagementStyle	…
SAK.txt	…
SM501.txt	…
SecurityBugs	…
SubmitChecklist	…
SubmittingDrivers	…
SubmittingPatches	…
VGA-softcursor.txt	…
applying-patches.txt	…
atomic_ops.txt	doc: Add load/store guarantees to Documentation/atomic-ops.txt	2011-12-11 10:31:58 -08:00
bad_memory.txt	…
basic_profiling.txt	…
binfmt_misc.txt	…
braille-console.txt	…
bt8xxgpio.txt	…
btmrvl.txt	…
bus-virt-phys-mapping.txt	…
cachetlb.txt	…
circular-buffers.txt	…
clk.txt	Documentation: common clk API	2012-03-16 20:35:01 +00:00
coccinelle.txt	coccinelle.txt: update documentation to include M= option	2012-01-14 22:25:56 +01:00
cpu-hotplug.txt	documentation: remove references to cpu_*_map.	2012-03-29 15:38:31 +10:30
cpu-load.txt	…
cputopology.txt	…
crc32.txt	crc32: move long comment about crc32 fundamentals to Documentation/	2012-03-23 16:58:37 -07:00
dcdbas.txt	…
debugging-modules.txt	…
debugging-via-ohci1394.txt	…
dell_rbu.txt	…
devices.txt	vhost-net: add module alias (v2.1)	2012-01-13 10:12:23 -08:00
digsig.txt	crypto: digital signature verification support	2011-11-09 12:10:37 +02:00
dma-buf-sharing.txt	dma-buf: document fd flags and O_CLOEXEC requirement	2012-03-26 11:33:22 +05:30
dmaengine.txt	Documentation: Fix multiple typo in Documentation	2012-03-07 16:08:24 +01:00
dontdiff	Documentation: remove 'mach' from dontdiff file	2012-03-30 16:03:15 -07:00
dynamic-debug-howto.txt	dynamic_debug: process multiple debug-queries on a line	2012-01-24 12:50:36 -08:00
edac.txt	EDAC: Correct scrub rate API	2012-03-19 12:03:58 +01:00
eisa.txt	…
email-clients.txt	…
feature-removal-schedule.txt	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-04-12 15:16:26 -07:00
flexible-arrays.txt	…
futex-requeue-pi.txt	…
gcov.txt	…
gpio.txt	Documentation/gpio.txt: Explain expected pinctrl interaction	2012-03-12 11:27:07 -06:00
highuid.txt	…
hw_random.txt	…
hwspinlock.txt	…
init.txt	…
initrd.txt	…
intel_txt.txt	…
io-mapping.txt	…
io_ordering.txt	…
iostats.txt	…
irqflags-tracing.txt	…
isapnp.txt	…
java.txt	…
kernel-doc-nano-HOWTO.txt	…
kernel-docs.txt	…
kernel-parameters.txt	Merge branch 'for-3.4' of git://linux-nfs.org/~bfields/linux	2012-03-29 14:53:25 -07:00
kmemcheck.txt	…
kmemleak.txt	kmemleak: Handle percpu memory allocation	2011-12-02 16:12:42 +00:00
kobject.txt	driver-core: documentation: fix up Greg's email address	2012-02-15 14:48:01 -08:00
kprobes.txt	…
kref.txt	…
ldm.txt	…
local_ops.txt	…
lockdep-design.txt	lockdep: Update documentation for lock-class leak detection	2011-12-11 10:31:23 -08:00
lockstat.txt	…
lockup-watchdogs.txt	watchdog: Update documentation	2012-02-11 15:11:28 +01:00
logo.gif	…
logo.txt	…
magic-number.txt	drivers/net: fix up stale paths from driver reorg	2012-01-30 12:54:40 -05:00
mca.txt	…
md.txt	md: create externally visible flags for supporting hot-replace.	2011-12-23 10:17:51 +11:00
media-framework.txt	…
memory-barriers.txt	…
memory-hotplug.txt	…
memory.txt	…
mono.txt	Documentation: remove references to /etc/modprobe.conf	2012-03-30 16:03:15 -07:00
mutex-design.txt	…
nommu-mmap.txt	…
numastat.txt	Doc: Update numastat.txt	2012-02-28 16:05:06 +01:00
oops-tracing.txt	module,bug: Add TAINT_OOT_MODULE flag for modules not built in-tree	2011-11-07 07:54:42 +10:30
padata.txt	…
parport-lowlevel.txt	…
parport.txt	Documentation: remove references to /etc/modprobe.conf	2012-03-30 16:03:15 -07:00
pi-futex.txt	…
pinctrl.txt	pinctrl: enhance mapping table to support pin config operations	2012-03-05 11:25:11 +01:00
pnp.txt	…
preempt-locking.txt	…
printk-formats.txt	…
prio_tree.txt	…
ramoops.txt	…
rbtree.txt	…
remoteproc.txt	remoteproc: remove the single rpmsg vdev limitation	2012-03-06 19:14:12 +02:00
rfkill.txt	…
robust-futex-ABI.txt	…
robust-futexes.txt	…
rpmsg.txt	rpmsg: add virtio-based remote processor messaging bus	2012-02-08 22:53:58 +02:00
rt-mutex-design.txt	…
rt-mutex.txt	…
rtc.txt	…
serial-console.txt	…
sgi-ioc4.txt	…
sgi-visws.txt	…
sparse.txt	…
spinlocks.txt	…
stable_api_nonsense.txt	…
stable_kernel_rules.txt	stable: update documentation to ask for kernel version	2012-01-24 10:50:22 -08:00
static-keys.txt	static keys: Add docs better explaining the whole 'struct static_key' mechanism	2012-02-24 09:12:19 +01:00
svga.txt	…
sysfs-rules.txt	…
sysrq.txt	Documentation: sysrq: Crutcher Dunnavant is unavailable	2012-03-30 16:03:15 -07:00
unaligned-memory-access.txt	…
unicode.txt	…
unshare.txt	…
vgaarbiter.txt	misc latin1 to utf8 conversions	2012-01-02 13:04:55 +01:00
video-output.txt	…
volatile-considered-harmful.txt	…
workqueue.txt	…
xz.txt	…
zorro.txt	…